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Microsoft 365 Changelog

M365 Changelog: Theme and Fluent icon updates in Teams on the web, Windows and Mac

Petri Staff

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MC225329 – We have updated the post for additional clarity. Thank you for your patience.

We are updating the default and dark theme colors in Teams on web, Windows, and Mac and will also update Fluent icons to align other Microsoft 365 applications.

Key points

  • Microsoft 365 Roadmap ID 68721
  • Timing:
    • Public Preview: mid-January (previously late-November)
    • Standard release: mid-February (previously mid-January)
    • Government cloud: end of February (previously mid-February)
  • Roll-out: tenant level
  • Action: review and assess 

How this will affect your organization

When your users access Teams on the web, the default and dark themes will be updated as well as the icons for all themes. 

Microsoft uses the Fluent design system to ensure a cohesive and accessible design for all Microsoft products and users. Most changes are subtle, such as:

  • Added drop shadows between panels
  • Rounded corners for square graphical elements (like buttons)
  • Color adjustments to the default and dark themes

Current design


Updated design

What you need to do to prepare

You might want to notify your users about this change.

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